What Problem Does It Solve?
Bearing heat-treatment hardness is a key indicator for ensuring wear resistance and service life, but in actual production it faces the following challenges:
- Large workpieces cannot be measured on a bench-top machines: Large and extra-large bearing rings (outer diameter > 500mm) cannot be placed on a standard Rockwell hardness tester.Traditional methods require cutting samples, which damages the workpiece and is inefficient.
- Installed components cannot be disassembled: After the bearing is installed in the main equipment, it cannot be disassembled for inspection. It is necessary to quickly assess the hardness on-site to determine whether it needs to be replaced.
- Surface hardening hardness testing: Hardness testing on raceway surface hardened layers.
The Beijing TIME TH140 Portable Leeb Hardness Tester: It brings hardness testing capabilities to the production site. With non-destructive, portable, and fast characteristics, it completely solves the above problems. The Leeb hardness tester is suitable for on-site hardness inspection of large components, such as large and extra-large bearing parts that cannot be tested with a bench-top tester.
Main Functions
- On-site Hardness Testing of Large Bearing Rings: For large-diameter rings (outer diameter > 500mm) used in wind power and construction machinery, the instrument can be held directly on the raceway for testing without moving the workpiece, avoiding cutting and sampling.
- Surface Hardening Hardness Testing: Hardness testing on raceway surface hardened layers.
Key Parameters
| Brand / Model | Beijing Time / HTH140 |
|---|---|
| Measuring Range | 170–960 HLD |
| Measuring Direction | 360° All directions |
| Indication Error | Indication Error±0.8% (at HLD = 800) |
| Indication Repeatability | Relative error ≤ 0.8% (at HLD = 800) |
| Impact Device | Standard D-type; optional DL-type |
| Interface | RS232, connectable to PC for data management |
| Dimensions | 270×86×47 mm |
| Weight | Approx. 530 g (including main unit and printer) |
| Operating Temperature | 0℃–40℃ |
Suitable for workpieces with surface curvature radius Rmin = 50 mm; with a special support ring, suitable for workpieces with Rmin = 10 mm.
Typical Applications at Our Factory
On-site hardness testing of large and extra-large bearing rings: Test hardness on-site without cutting samples.
Surface hardening hardness testing: Hardness testing on raceway surface hardened layers.
Pre-maintenance assessment of installed bearings: When bearings cannot be disassembled during equipment operation, use the TH140 to measure exposed raceway surfaces to quickly determine if hardness has decreased due to overload and decide on maintenance plans.
Conclusion
The portable Leeb hardness tester transforms hardness inspection of large bearings from “destructive sampling inspection” into “on-site non-destructive testing.” With its lightweight 530 g design and 360°omnidirectional measuring capability, the Beijing TIME TH140 makes hardness testing more convenient, efficient, and flexible.
Lightweight and readily available, hardness testing is just a step away.